n-Heptane Isomerization over Ni Doped MoOx Catalyst

Abstract

Abstract: The Ni doped molybdenum oxide(Ni-MoO_x) as the catalyst for n-heptane isomerization has been studied in a conventional fixed bed reactor. It is indicated that addition of mass fractions 2%-5% Ni to MoO₃ can markedly shorten the reduction period of H₂ which is necessary for the formation of active phase Ni-MoO_x catalyzing n-heptane isomerization. The relative activity for n-heptane isomerization in terms of unit surface area of the catalyst can be enhanced greatly by addition of Ni as well. On the Ni-MoO_x catalyst, the apparent activation energy for n-heptane isomerization is ca. 35.3 kJ/mol, which is obviously lower than 49.3 kJ/mol obtained on MoO_x. And it is 1/3-1/4 as low as those of zeolite-based bifunctional catalyst for the n-heptane isomerization.

Key words: Isomerization, n-Heptane, Ni-MoO_x, MoO₃, Activation energy

CLC Number:

O643.3

TrendMD:

WANG Ying-Jun, WANG Xin-Ping, CHAI Song-Hai, CAI Tian-Xi . n-Heptane Isomerization over Ni Doped MoO_x Catalyst[J]. Chem. J. Chinese Universities, 2003, 24(7): 1281.

References

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